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基本情報
登録情報 | データベース: PDB / ID: 5jlh | |||||||||
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タイトル | Cryo-EM structure of a human cytoplasmic actomyosin complex at near-atomic resolution | |||||||||
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![]() | CONTRACTILE PROTEIN / CONTRACTILE FILAMENT / MUSCLE / THIN FILAMENT / CYTOSKELETON / STRUCTURAL PROTEIN / HYDROLASE COMPLEX / F-actin / tropomyosin / filament / myosin / protein polymers / cryo EM | |||||||||
機能・相同性 | ![]() RHOBTB2 GTPase cycle / RHOU GTPase cycle / RHOV GTPase cycle / contractile vacuole / COPI-mediated anterograde transport / Platelet degranulation / sorocarp development / myosin II filament / basal body patch / macropinocytic cup ...RHOBTB2 GTPase cycle / RHOU GTPase cycle / RHOV GTPase cycle / contractile vacuole / COPI-mediated anterograde transport / Platelet degranulation / sorocarp development / myosin II filament / basal body patch / macropinocytic cup / Neutrophil degranulation / tight junction assembly / actin crosslink formation / protein localization to bicellular tight junction / profilin binding / actin filament-based movement / vocalization behavior / regulation of transepithelial transport / morphogenesis of a polarized epithelium / actomyosin / structural constituent of postsynaptic actin cytoskeleton / Formation of annular gap junctions / Formation of the dystrophin-glycoprotein complex (DGC) / Gap junction degradation / Cell-extracellular matrix interactions / dense body / myosin filament / RHO GTPases Activate ROCKs / regulation of stress fiber assembly / hyperosmotic response / RHO GTPases activate CIT / actomyosin structure organization / Sema4D induced cell migration and growth-cone collapse / Adherens junctions interactions / Sensory processing of sound by outer hair cells of the cochlea / myosin II complex / Interaction between L1 and Ankyrins / Sensory processing of sound by inner hair cells of the cochlea / sarcomere organization / regulation of focal adhesion assembly / apical junction complex / cortical actin cytoskeleton / positive regulation of wound healing / EPHA-mediated growth cone collapse / microfilament motor activity / maintenance of blood-brain barrier / NuA4 histone acetyltransferase complex / cell leading edge / filamentous actin / myofibril / RHO GTPases activate PAKs / Recycling pathway of L1 / pseudopodium / regulation of synaptic vesicle endocytosis / brush border / mitotic cytokinesis / actin filament bundle assembly / EPH-ephrin mediated repulsion of cells / RHO GTPases Activate WASPs and WAVEs / skeletal muscle contraction / phagocytosis / RHO GTPases activate IQGAPs / neuronal action potential / RHOBTB2 GTPase cycle / skeletal muscle tissue development / stress fiber / RHO GTPases activate PKNs / phagocytic vesicle / EPHB-mediated forward signaling / calyx of Held / extracellular matrix / axonogenesis / cellular response to starvation / cell projection / Translocation of SLC2A4 (GLUT4) to the plasma membrane / mitochondrion organization / actin filament / FCGR3A-mediated phagocytosis / cell motility / sensory perception of sound / RHO GTPases Activate Formins / Signaling by high-kinase activity BRAF mutants / MAP2K and MAPK activation / Schaffer collateral - CA1 synapse / 加水分解酵素; 酸無水物に作用; 酸無水物に作用・細胞または細胞小器官の運動に関与 / Regulation of actin dynamics for phagocytic cup formation / structural constituent of cytoskeleton / cellular response to type II interferon / VEGFA-VEGFR2 Pathway / platelet aggregation / Signaling by RAF1 mutants / Signaling by moderate kinase activity BRAF mutants / Paradoxical activation of RAF signaling by kinase inactive BRAF / Signaling downstream of RAS mutants / actin filament binding / Signaling by BRAF and RAF1 fusions / cell-cell junction / actin cytoskeleton / regulation of cell shape / Clathrin-mediated endocytosis 類似検索 - 分子機能 | |||||||||
生物種 | ![]() ![]() ![]() | |||||||||
手法 | 電子顕微鏡法 / 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 3.9 Å | |||||||||
![]() | von der Ecken, J. / Heissler, S.M. / Pathan-Chhatbar, S. / Manstein, D.J. / Raunser, S. | |||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Cryo-EM structure of a human cytoplasmic actomyosin complex at near-atomic resolution. 要旨: The interaction of myosin with actin filaments is the central feature of muscle contraction and cargo movement along actin filaments of the cytoskeleton. The energy for these movements is generated ...The interaction of myosin with actin filaments is the central feature of muscle contraction and cargo movement along actin filaments of the cytoskeleton. The energy for these movements is generated during a complex mechanochemical reaction cycle. Crystal structures of myosin in different states have provided important structural insights into the myosin motor cycle when myosin is detached from F-actin. The difficulty of obtaining diffracting crystals, however, has prevented structure determination by crystallography of actomyosin complexes. Thus, although structural models exist of F-actin in complex with various myosins, a high-resolution structure of the F-actin–myosin complex is missing. Here, using electron cryomicroscopy, we present the structure of a human rigor actomyosin complex at an average resolution of 3.9 Å. The structure reveals details of the actomyosin interface, which is mainly stabilized by hydrophobic interactions. The negatively charged amino (N) terminus of actin interacts with a conserved basic motif in loop 2 of myosin, promoting cleft closure in myosin. Surprisingly, the overall structure of myosin is similar to rigor-like myosin structures in the absence of F-actin, indicating that F-actin binding induces only minimal conformational changes in myosin. A comparison with pre-powerstroke and intermediate (Pi-release) states of myosin allows us to discuss the general mechanism of myosin binding to F-actin. Our results serve as a strong foundation for the molecular understanding of cytoskeletal diseases, such as autosomal dominant hearing loss and diseases affecting skeletal and cardiac muscles, in particular nemaline myopathy and hypertrophic cardiomyopathy. | |||||||||
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構造の表示
ムービー |
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構造ビューア | 分子: ![]() ![]() |
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PDBx/mmCIF形式 | ![]() | 735.5 KB | 表示 | ![]() |
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PDB形式 | ![]() | 588.6 KB | 表示 | ![]() |
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その他 | ![]() |
-検証レポート
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
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-関連構造データ
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リンク
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集合体
登録構造単位 | ![]()
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非結晶学的対称性 (NCS) | NCSドメイン:
NCSドメイン領域:
NCSアンサンブル:
NCS oper:
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要素
#1: タンパク質 | 分子量: 41707.570 Da / 分子数: 5 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() 発現宿主: ![]() ![]() 参照: UniProt: P63261 #2: タンパク質 | 分子量: 117570.633 Da / 分子数: 2 / 由来タイプ: 組換発現 詳細: NON MUSCLE MYOSIN 2C HEAVY CHAIN, MOTOR DOMAIN RESIDUES 1-799 LINKED TO ALPHA-ACTININ 3, REPEATS 1 AND 2 RESIDUES 800-1039 FRAGMENT: UNP Q7Z406-1 RESIDUES 1-799, UNP P05095 RESIDUES 265-502 由来: (組換発現) ![]() ![]() ![]() 遺伝子: MYH14, KIAA2034, FP17425, abpA, actnA, DDB_G0268632 発現宿主: ![]() ![]() 参照: UniProt: Q7Z406, UniProt: P05095 #3: タンパク質 | 分子量: 11507.176 Da / 分子数: 4 / 由来タイプ: 組換発現 詳細: Human TROPOMYSIN WAS USED (UNP P06753-2,TPM3_HUMAN, RESIDUES 62-196). DUE TO THE LIMITED RESOLUTION OF THE CRYO-EM DENSITY IN THE REGION OF TROPOMYOSIN, TROPOMYOSIN HAS BEEN REPRESENTED AS POLY(UNK). 由来: (組換発現) ![]() ![]() ![]() #4: 化合物 | ChemComp-ADP / #5: 化合物 | ChemComp-MG / 配列の詳細 | Human TROPOMYSIN WAS USED (UNP P06753-2,TPM3_HUMAN, RESIDUES 62-196) DUE TO THE LIMITED RESOLUTION ...Human TROPOMYSIN | |
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-実験情報
-実験
実験 | 手法: 電子顕微鏡法 |
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EM実験 | 試料の集合状態: FILAMENT / 3次元再構成法: 単粒子再構成法 |
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試料調製
構成要素 |
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分子量 | 値: 0.44 MDa / 実験値: NO | ||||||||||||||||||||||||||||
由来(天然) |
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由来(組換発現) |
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緩衝液 | pH: 7.5 詳細: 5 mM Tris-HCl pH 7.5, 1 mM DTT, 100 mM KCl, and 2 mM MgCl2 | ||||||||||||||||||||||||||||
緩衝液成分 |
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試料 | 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES | ||||||||||||||||||||||||||||
試料支持 | グリッドの材料: COPPER / グリッドのサイズ: 300 divisions/in. / グリッドのタイプ: C-flat-2/1 | ||||||||||||||||||||||||||||
EM embedding | Material: I | ||||||||||||||||||||||||||||
急速凍結 | 装置: GATAN CRYOPLUNGE 3 / 凍結剤: ETHANE / 湿度: 90 % 詳細: Sample (2 uL of F-actin-tropomyosin solution) was applied to a glow-discharged holey carbon grid, incubated for 20 s and manually blotted from the backside for less than a second with filter ...詳細: Sample (2 uL of F-actin-tropomyosin solution) was applied to a glow-discharged holey carbon grid, incubated for 20 s and manually blotted from the backside for less than a second with filter paper. Afterwards 1.5 uL of myosin solution (3 uM without nucleotide) were added directly on the grid, incubated for 10 s and then manually blotted for 5 s from the backside with filter paper. |
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電子顕微鏡撮影
実験機器 | ![]() モデル: Titan Krios / 画像提供: FEI Company |
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顕微鏡 | モデル: FEI TITAN KRIOS / 詳細: Cs corrected microscope |
電子銃 | 電子線源: ![]() |
電子レンズ | モード: BRIGHT FIELD / 倍率(公称値): 59000 X / Calibrated defocus min: 700 nm / 最大 デフォーカス(補正後): 2800 nm |
撮影 | 平均露光時間: 0.475 sec. / 電子線照射量: 16 e/Å2 / 検出モード: COUNTING フィルム・検出器のモデル: FEI FALCON II (4k x 4k) 実像数: 6300 |
画像スキャン | 動画フレーム数/画像: 8 / 利用したフレーム数/画像: 2-8 |
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解析
ソフトウェア | 名称: REFMAC / バージョン: 5.8.0088 / 分類: 精密化 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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EMソフトウェア |
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CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
らせん対称 | 回転角度/サブユニット: 166.9 ° / 軸方向距離/サブユニット: 27.5 Å / らせん対称軸の対称性: C1 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
粒子像の選択 | 選択した粒子像数: 138000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
3次元再構成 | 解像度: 3.9 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 118000 詳細: THE TROPOMYOSIN MAP FILTERED TO 7.0 ANGSTROM WAS MERGED WITH THE FINAL F-ACTIN-MYOSIN MAP (3.9 ANGSTROM) TO OBTAIN A MAP OF THE ENTIRE F-ACTIN-MYOSIN-TROPOMYOSIN COMPLEX. 対称性のタイプ: HELICAL | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
原子モデル構築 |
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原子モデル構築 | Source name: PDB / タイプ: experimental model
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精密化 | 解像度: 3.9→211.2 Å / Cor.coef. Fo:Fc: 0.907 / SU B: 27.204 / SU ML: 0.36 / ESU R: 0.558 立体化学のターゲット値: MAXIMUM LIKELIHOOD WITH PHASES 詳細: HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS MERGED WITH THE FINAL F-ACTIN-MUYOSIN MAP (3.9 ANGSTROM) TO OBTAIN MAP OF THE ENTIRE F-ACTIN TROPOMYOSIN COMPLEX.
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溶媒の処理 | イオンプローブ半径: 0.8 Å / 減衰半径: 0.8 Å / VDWプローブ半径: 1.2 Å / 溶媒モデル: MASK | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
原子変位パラメータ | Biso mean: 180.474 Å2
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精密化ステップ | サイクル: 1 / 合計: 26477 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
拘束条件 |
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